Last year i sent out a LOR, 1xphoto, SAE, IRC around July/August. I received the photo back the end of November, so I had around a 3 month wait. I have wondered if he wrote on the envelope as well.
Address Used:
Zachary Levi
'Chuck'
Middle Man Productions
11271 Ventura Blvd.
Suite 434
Studio City, CA 91604
USA